8道SAT数学选择题练习(一).

　　下面是为大家准备的8道SAT考试数学选择题练习题。同学们在备考SAT数学的过程中，一定要加强习题的练习，熟练到能充分理解题意，争取得到满分。

　　1.If, for which of the following values ofisNOT dined?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　2.A jar contains only red marbles and green marbles. If a marble is selected at random from the jar, the probability that a red marble will be selected is . If there are 36 green marbles in the jar, how many red marbles are there in the jar?

　　Answer Choices

　　(A) 18

　　(B) 24

　　(C) 54

　　(D) 72

　　(E) 108

　　3.Read the following SAT test question and then click on a button to select your answer.

　　In a survey, a group of students from Westville High School were asked about their favorite movie genre. Each student in the group selected exactly one movie genre, and the data collected are summarized in the circle graph above. If more students chose Action than Fiction, how many students were surveyed in total?

　　Answer Choices

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　4.If the function is dined by , where , for which of the following values of is

undined?

　　Answer Choices

　　(A) None

　　(B) only

　　(C) only

　　(D) and only

　　(E) , , and

　　5.

　　6.

　　7.In a class of seniors, there are boys for every girls. In the junior class, there are boys for everygirls.If the two classes combined have an equal number of boys and girls, how many students are in the junior class?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　8.

　　The function , dined for, is graphed above. For how many different values of is ?

　　Answer Choices

　　(A) None

　　(B) One

　　(C) Two

　　(D) Three

　　(E) Four

　　参考答案及解析：

　　1.The correct answer is B

　　Explanation

　　Division byis not dined, sois not dined when. The productis equal toifor if. Therore,is dined for all of the choices except.

　　2.The correct answer is D

　　Explanation

　　Choice (D) is correct. Let r be the number of red marbles in the jar. The probability of selecting a red marble is equal to the number of red marbles divided by the total number of marbles. Since the probability of selecting a red marble is , it follows that . There are 36 green marbles and r red marbles, so the previous equation becomes . This simplifies to2(r + 36) = 3r, or 2r + 72 = 3r. Therore, the number of red marbles, r, is 72.

　　3.The correct answer is D

　　Explanation

　　From the circle graph, of the students surveyed chose Action and chose Fiction as their favorite movie genre. Hence students is equal to of the total number of students surveyed. Let be the number of students surveyed; then the last statement can be written symbolically as .Solving for gives . Therore, the total number of students surveyed was .

　　4.

　　The correct answer is C

　　Explanation

　　If , then . If , then . If , then , which is not dined because division by is undined. Therore, of the three values, , , and , the only one for which is undined is . Thus the correct response is only.

　　5.

　　6.

　　7.The correct answer is D

　　Explanation

　　Among the seniors, there are boys for every girls, so of the seniors, or , are boys and , or

, are girls. Among the juniors, are boys and are girls. If stands for the total number of juniors, then are boys and are girls. The total number of senior and junior boys is . The total number of senior and junior girls is . The question states that these quantities are equal, so . Solving this gives , or .

　　8.The correct answer is E

　　Explanation

　　when the point is on the graph of . Drawing the line , as in the graph below, shows that the is equal to for four values of between and .

　　以上就是关于8道SAT考试数学选择题练习题及其答案和解析，非常详细。同学们在备考阶段，一定要加强习题的练习以及题意的理解，争取SAT数学满分。

　　下面是为大家准备的8道SAT考试数学选择题练习题。同学们在备考SAT数学的过程中，一定要加强习题的练习，熟练到能充分理解题意，争取得到满分。

　　1.If, for which of the following values ofisNOT dined?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　2.A jar contains only red marbles and green marbles. If a marble is selected at random from the jar, the probability that a red marble will be selected is . If there are 36 green marbles in the jar, how many red marbles are there in the jar?

　　Answer Choices

　　(A) 18

　　(B) 24

　　(C) 54

　　(D) 72

　　(E) 108

　　3.Read the following SAT test question and then click on a button to select your answer.

　　In a survey, a group of students from Westville High School were asked about their favorite movie genre. Each student in the group selected exactly one movie genre, and the data collected are summarized in the circle graph above. If more students chose Action than Fiction, how many students were surveyed in total?

　　Answer Choices

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　4.If the function is dined by , where , for which of the following values of is

undined?

　　Answer Choices

　　(A) None

　　(B) only

　　(C) only

　　(D) and only

　　(E) , , and

　　5.

　　6.

　　7.In a class of seniors, there are boys for every girls. In the junior class, there are boys for everygirls.If the two classes combined have an equal number of boys and girls, how many students are in the junior class?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　8.

　　The function , dined for, is graphed above. For how many different values of is ?

　　Answer Choices

　　(A) None

　　(B) One

　　(C) Two

　　(D) Three

　　(E) Four

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